Which TB for a 398 stroker?? 52 or 58

Reply Subscribe

Thread Tools

Search this Thread

Oct 10, 2008 | 12:18 PM

#21

Abdullah

TECH Fanatic

iTrader: (2)

Joined: Jun 2002

Posts: 1,455

Likes: 3

From: Kuwait

for the 398 LT1 you have go with a 58mm TB and even a monoblade TB if you can. throttle body size doesn't hurt the motor's performance and even ported intake manifold doesn't hurt, it is the heads that have been over-ported will hurt performance.

but you have to tune after you install either the 58mm TB or the monoblade TB.

Oct 10, 2008 | 01:03 PM

#22

jarretthise

TECH Fanatic

iTrader: (9)

Joined: Dec 2007

Posts: 1,140

Likes: 1

From: crawfordsville, IN

Quote:

Originally Posted by LittleRedZ

i've made 725rwhp through a 52mm and unported stock manifold through a th400 and 9" rear, when pushing air into the intake it dosent hurt that much but when sucking on N/A motor you want to suck as much air as possible.

and i would assume you could be making a little more power if you had your intake ported and polished to 58mm!! i could be wrong, dont know what setup your running so.

as for your ? though i would have to say 58mm...thats the logical way to go..

Oct 10, 2008 | 02:15 PM

#23

slomarao

TECH Fanatic

iTrader: (6)

Joined: Dec 2007

Posts: 1,147

Likes: 0

From: chicago,IL

id say 58mm. monoblade if you have big plans/deep pockets.

Reply Subscribe